Swimmers are the only racing competitors who don't cross a finish line. Instead they have electronic touch boards at the end of each pool lane that will accurately record the end of each length.
游泳选手是唯一不需要通过终点线的速度比赛选手，取而代之的是安装在泳道末端的电动计时触板，它将精确地记录下选手们每次游到终点的时间。
Touch: To touch the end of the pool with the hand or hands, completing an event or relay leg.
触池 壁：用单 手或双 手接触池 壁，以完成接力项目的一个赛段或一项比赛。
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